·功能:TCP客戶端套接字·構造方法:   Socket(InetAddress address, int port)   創建一個流套接字并將其連接到指定 IP 地址的指定端口號·常用方法:   1.getInetAddress   獲得InetAddress的相關信息  2.getInputStream   獲得此TCP連接的輸入流  3.getOutPutStream   獲得此TCP連接的輸出流

·功能: TCP服務端套接字·構造方法:   ServerSocket(int port)   創建綁定到特定端口的服務器套接字。·常用方法:   1.accept   獲得TCP連接的客戶端的socket  2.isClosed   獲得ServerSocket的關閉狀態

package cn.xidian.tcpSocket;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;public class TcpServer extends Thread{	Socket clientSocket;	public TcpServer(Socket clientSocket) {		super();		this.clientSocket = clientSocket;	}	@Override	  public void run() {		try {			//獲得客戶端的ip地址和主機名			String clientAddress = clientSocket.getInetAddress().getHostAddress();			String clientHostName = clientSocket.getInetAddress().getHostName();			System.out.println(clientHostName + "(" + clientAddress + ")" + " 連接成功!");			System.out.println("Now, 傳輸圖片數據...........");			long startTime = System.currentTimeMillis();			//獲取客戶端的OutputStream			OutputStream out = clientSocket.getOutputStream();			//傳出圖片數據			FileInputStream in = new FileInputStream(new File("/home/gavinzhou/test.jpg"));			byte[] data = new byte[4096];			int length = 0;			while((length = in.read(data)) != -1){				out.write(data, 0, length);				//寫出數據			}			long endTime = System.currentTimeMillis();			//提示信息			System.out.println(clientHostName + "(" + clientAddress + ")" + " 圖片傳輸成功," + "用時:" + ((endTime-startTime)) + "ms");			//關閉資源			in.close();			clientSocket.close();			System.out.println("連接關閉!");		}		catch (IOException e) {			e.printStackTrace();		}	}	public static void main(String[] args) throws IOException {		//建立TCP連接服務,綁定端口		ServerSocket tcpServer = new ServerSocket(9090);		//接受連接,傳圖片給連接的客戶端,每個TCP連接都是一個java線程		while(true){			Socket clientSocket = tcpServer.accept();			new TcpServer(clientSocket).start();		}	}}

package cn.xidian.tcpSocket;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.InetAddress;import java.net.Socket;public class TcpClient {	public static void main(String[] args) throws IOException {		// 建立TCP服務		// 連接本機的TCP服務器		Socket socket = new Socket(InetAddress.getLocalHost(), 9090);		// 獲得輸入流		InputStream inputStream = socket.getInputStream();		// 寫入數據		FileOutputStream out = new FileOutputStream(new File("../save.jpg"));		byte[] data = new byte[4096];		int length = 0;		while((length = inputStream.read(data)) != -1){			out.write(data, 0, length);		}		//關閉資源		out.close();		socket.close();	}}